From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f78.google.com (mail-io1-f78.google.com [209.85.166.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 29BEC28934A for ; Fri, 20 Jun 2025 11:02:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750417348; cv=none; b=NGzL34vSObrQANB/DyDXv5qLUnr4IrmRSjPy2VQ5opAI4rxjISe3rQA/Px7gkxPQWBTkZYeTcHY3Qlde3moKg0hoNXYz5pEcxQ26UXi0Wn+21xvx6ZTQD/Dhw8vXuziq+sKCLwTfVD3GQCp1eeU8RUuAybsZkaR72HeItYG7IA0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750417348; c=relaxed/simple; bh=iKD3mOzrfDWywd4Zfuvy+Y9C7Kn49H/mvCcbac8muPY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=mKjTdKQuzWog2qnFFOT8L9rXwc4xh0DCNFDRSbI8MKicasWrbAFcQXnAlgVhbFQ70kVPH58iR/GC29mX3q+h/3ZbxJ1Qcn1qxvuo11yj42JfL2VXFXyEhI9v+3ep+mlSyinzPnjA8HCoxSdcIKx+lEJma1BHJLViiDZnXjhdiiE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.78 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f78.google.com with SMTP id ca18e2360f4ac-87595d00ca0so128514939f.2 for ; Fri, 20 Jun 2025 04:02:26 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1750417346; x=1751022146; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=SjmGfFdQ3OW7xmT/wki6+bin2IsFnsHG1ciZdNAwxz4=; b=ZKFpnSVpQR2020Tx711Rww7sgeES1cpzDTy3U7tZp96y017YsVz3kLHg4oxgKbLSuc bAtBs/UwlZr6qX2guvbVVFBX1P2PaVbF0eCiEnKl4J2bMCztMzcBXn8ZHmD/o6KMWHla /UZyxmEr6me6BfYg6EmR7FGJRkYm7fhQ0f7uT4UU3Z44M73/W5RDMef86c/QWVvisyhn Cezugz+YXVaK0jOgY5ofDPm6CoYsHluzDh7NgnFs6twy0F//Jf65wcI9KMo+Sy2qGI6A p5bs09GIo06L998zpeCEMOeyChUxFrO60vFymxJ6wrwDTSjEjMC0vfF+ACSgyZfuVOOa FDeg== X-Forwarded-Encrypted: i=1; AJvYcCXidpuzLhAC2rksKTwr7/iH61KTrJvruLZ0LF4ORRjgzYSubFXS5sdQ6KVw/e/PmR8cOvJs/45GFnrwDG8=@vger.kernel.org X-Gm-Message-State: AOJu0YxQxBmUz/TgaKsrJ8IvgDeRsRl25t+YNwwCBKzeYu8uUndhO/cm v6mSLgSTuutwdLGpcKPmzMH+6g3TnwDCu4yEFoASpJ5DNttgW2UzEJ2djmuosMX4HU+6EFjHepK HGD4YAnXfaPWgAR8Tkznu43gHHNd4vmX6xM64Vtbd/N+VqEY0rn+ckV7a7Hg= X-Google-Smtp-Source: AGHT+IF9BaVS6lJ2URCIGUDTxUO/JdHanbROVlj+8/hRjlRnpgM/ucvo/8p6DFj7zif39oqhi0C3+/Y7bGmGvuKR/KMn+UcNACPb Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2703:b0:3dc:7f3b:aca9 with SMTP id e9e14a558f8ab-3de38ca2cedmr22167895ab.14.1750417346068; Fri, 20 Jun 2025 04:02:26 -0700 (PDT) Date: Fri, 20 Jun 2025 04:02:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68553fc2.a00a0220.137b3.0048.GAE@google.com> Subject: [syzbot] [kernel?] BUG: unable to handle kernel paging request in netdev_unregister_kobject From: syzbot To: dakr@kernel.org, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, rafael@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 39dfc971e42d arm64/ptrace: Fix stack-out-of-bounds read in.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=15af690c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=941e423b930a32dc dashboard link: https://syzkaller.appspot.com/bug?extid=59e97f6296ecdc571f71 compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ee1a7942f1b9/disk-39dfc971.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5b94ed3d0f7e/vmlinux-39dfc971.xz kernel image: https://storage.googleapis.com/syzbot-assets/9ce219d3314e/Image-39dfc971.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+59e97f6296ecdc571f71@syzkaller.appspotmail.com Unable to handle kernel paging request at virtual address dfff80000000000b KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff80000000000b] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 7660 Comm: kbnepd bnep0 Not tainted 6.16.0-rc1-syzkaller-g39dfc971e42d #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : klist_put lib/klist.c:212 [inline] pc : klist_del+0x4c/0x110 lib/klist.c:230 lr : klist_del+0x28/0x110 lib/klist.c:229 sp : ffff80009e977720 x29: ffff80009e977720 x28: dfff800000000000 x27: ffff0000cda2c028 x26: 1ffff00013d2eef4 x25: ffff80009e9777a0 x24: 1fffe00019b458e5 x23: 1fffe0001ed3f28c x22: ffff0000cda2c728 x21: dfff800000000000 x20: 0000000000000000 x19: ffff0000f69f9460 x18: 00000000ffffffff x17: ffff8000892f3474 x16: ffff800080520d04 x15: 0000000000000001 x14: 1fffe0001eb56768 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001eb56769 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 000000000000000b x7 : ffff800080c3eef0 x6 : ffff800080c3b260 x5 : ffff0000cded8998 x4 : ffff800089214348 x3 : ffff800080f87888 x2 : 0000000000000001 x1 : 0000000000000004 x0 : 0000000000000058 Call trace: klist_put lib/klist.c:212 [inline] (P) klist_del+0x4c/0x110 lib/klist.c:230 (P) device_del+0x234/0x808 drivers/base/core.c:3858 netdev_unregister_kobject+0x2bc/0x3bc net/core/net-sysfs.c:2308 unregister_netdevice_many_notify+0x1934/0x1fac net/core/dev.c:12112 unregister_netdevice_many net/core/dev.c:12140 [inline] unregister_netdevice_queue net/core/dev.c:11984 [inline] unregister_netdevice include/linux/netdevice.h:3379 [inline] unregister_netdev+0x15c/0x1f8 net/core/dev.c:12158 bnep_session+0x208c/0x223c net/bluetooth/bnep/core.c:525 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847 Code: f9400268 927ff914 91016280 d343fc08 (38756908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f9400268 ldr x8, [x19] 4: 927ff914 and x20, x8, #0xfffffffffffffffe 8: 91016280 add x0, x20, #0x58 c: d343fc08 lsr x8, x0, #3 * 10: 38756908 ldrb w8, [x8, x21] <-- trapping instruction --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup